For information about obtaining the kernel source code, unpacking it, setting it up, and configuring it, take a look at the Kernel-HOWTO at http://www.linuxhq.com/HOWTO/Kernel-HOWTO.html.
The Sound-HOWTO, http://www.linuxhq.com/HOWTO/Sound-HOWTO.htm, includes information on setting up sound cards under Linux.
The isapnptools home page, http://www.roestock.demon.co.uk/isapnptools/, includes the latest release of isapnptools as well as information on using it.
Using a plug-and-play device under Linux requires the use of kernel modules, so make sure you have programs such as lsmod, insmod, rmmod and modprobe. If you don't, download the modutils package from ftp://sunsite.unc.edu/pub/Linux/kernel/modules-2.0.0.tar.gz.
All listings referred to in this article are available by anonymous download in the file ftp://ftp.ssc.com/pub/lj/listings/issue64/3269.tgz.